Vented Cross Bar (VCB)
Vented cross Bars are generally designed in discharge areas where direct irrigation is not feasible from the streams. Vented Cross Bars are constructed across the steams with re-inforced cement concrete on an average height of 2.5 m above bed level, a minimum of 2 vents and provision of wooden shutters to discharge the flood water and silt load carried during the monsoon seasons. Earthern canals are constructed for distribution of the raised up water behind the VCB flowing by gravity to the fields. Protection works upstream of the VCB and along the canals are also provided to protect earthen canals the since earthen canals are often found to get damaged, resulting in deposition of large quantities of sand and silt in the paddy fields. The cost of these structures varies depending on the width of the streams, bed profile and length of protection works and canals.
VCB cum tractor way across Kokkai-Odakkundu thodu
VCB constructed at Wayanad